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</Grid> </DataTemplate> </UserControl.Resources> <Grid x:Name="LayoutRoot" Background="White"> <data:DataGrid x:Name="dgProducts" AutoGenerateColumns="False" RowDetailsTemplate="{StaticResource dtProductRowDetails}" RowDetailsVisibilityMode="Collapsed"> <data:DataGrid.Columns> <data:DataGridTextColumn Binding="{Binding ProductID}" Header="ID" /> <data:DataGridTextColumn Binding="{Binding Name}" Header="Name" /> <data:DataGridTextColumn Binding="{Binding ProductNumber}" Header="Number"/> <data:DataGridTextColumn Binding="{Binding ListPrice}" Header="List Price"/> <data:DataGridTextColumn Binding="{Binding Style}" Header="Style"/> <data:DataGridTextColumn Binding="{Binding Color}" Header="Color"/> <data:DataGridTemplateColumn> <data:DataGridTemplateColumn.CellTemplate> <DataTemplate x:Key="dtShowDetailTemplate"> <Button Content="..." x:Name="ShowDetails" Click="ShowDetails_Click" /> </DataTemplate> </data:DataGridTemplateColumn.CellTemplate> </data:DataGridTemplateColumn> </data:DataGrid.Columns> </data:DataGrid> </Grid> </UserControl> The data template used for the RowDetailsTemplate is named dtProductRowDetails and contains fields bound to several properties in the Product data class plus some nested classes. It displays an image of the product along with category and inventory information. To use the data template in the DataGrid named dgProducts, set the DataGrid.RowDetailsVisibilityMode to Collapsed so that all rows have their detail information hidden to start with. To allow users to display row details on demand, an extra column of type DataGridTemplateColumn is added to the DataGrid with a specific CellTemplate containing a Button. (You will learn more about column templates in the next recipe.) The CellTemplate causes a Button to be displayed in the last column of each bound row, and you use the Button s click handler ShowDetails_Click() to allow the user to toggle the Visibility of the row detail information, as shown the codebehind for the page in Listing 5-9.

The main requirements of this page are to provide a way for the user to search for a pet s location by address and to show the search result on Google Maps. To satisfy these requirements, the following tasks should be accomplished: Create a form for submitting user s address as a query Provide the ability to search for pet locations in the database

using using using using using using using System; System.IO; System.Windows; System.Windows.Controls; System.Windows.Media; System.Windows.Media.Imaging; Recipe5_5.AdvWorks;

namespace Recipe5_5 { public partial class MainPage : UserControl { AdvWorksDataServiceClient client = new AdvWorksDataServiceClient();

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public MainPage() { InitializeComponent(); //async completion callbacks for the web service calls to get data client.GetPhotosCompleted += new EventHandler<GetPhotosCompletedEventArgs>( delegate(object s1, GetPhotosCompletedEventArgs e1) { (e1.UserState as Product).ProductPhoto = e1.Result; }); client.GetInventoryCompleted += new EventHandler<GetInventoryCompletedEventArgs>( delegate(object s2, GetInventoryCompletedEventArgs e2) { (e2.UserState as Product).ProductInventories = e2.Result; (e2.UserState as Product).InventoryLevelBrush = null; (e2.UserState as Product).InventoryLevelMessage = null; }); client.GetCategoryCompleted += new EventHandler<GetCategoryCompletedEventArgs>( delegate(object s3, GetCategoryCompletedEventArgs e3) { (e3.UserState as Product).ProductCategory = e3.Result; }); client.GetSubcategoryCompleted += new EventHandler<GetSubcategoryCompletedEventArgs>( delegate(object s4, GetSubcategoryCompletedEventArgs e4)

mean, it s just a tall building where you go out on the roof in the middle of Manhattan. You wouldn t think it would be such an awe-inspiring experience. But it was. A few Fog Creek employees go along on each activity, too. At the end of the summer, there are always a few interns who convinced us that they are the truly great kinds of programmers that we just have to hire. Not all of them, mind you some are merely great programmers that we are willing to pass on, and others would be great somewhere else, but not at Fog Creek. For example, we re a fairly autonomous company without a lot of middle management, where people are expected to be completely selfdriven. Historically, a couple of times we hired a summer intern who would have be great in a situation where they had someone to guide them, but at Fog Creek they didn t get enough direction and floundered. Anyway, for the ones we really want to hire, there s no use in waiting. We make an early offer for a full-time job, conditional on their graduating. And it s a great offer. We want them to be able to go back to school, compare notes with their friends, and realize that they re getting a higher starting salary than anyone else. Does this mean we re overpaying Not at all. You see, the average first year salary has to take

{ (e4.UserState as Product).ProductSubCategory = e4.Result; }); client.GetDescriptionCompleted += new EventHandler<GetDescriptionCompletedEventArgs>( delegate(object s5, GetDescriptionCompletedEventArgs e5) { (e5.UserState as Product).ProductDescription = e5.Result; }); client.GetProductCostHistoryCompleted += new EventHandler<GetProductCostHistoryCompletedEventArgs>( delegate(object s6, GetProductCostHistoryCompletedEventArgs e6) { (e6.UserState as Product).ProductCostHistories = e6.Result; }); //LoadingRowDetails handler - here we make the calls to load //row details data on demand dgProducts.LoadingRowDetails += new EventHandler<DataGridRowDetailsEventArgs>( delegate(object sender, DataGridRowDetailsEventArgs e) { Product prod = e.Row.DataContext as Product; if (prod.ProductInventories == null) client.GetInventoryAsync(prod, prod); if (prod.ProductCategory == null && prod.ProductSubcategoryID != null) client.GetCategoryAsync(prod, prod); if (prod.ProductSubCategory == null && prod.ProductSubcategoryID != null) client.GetSubcategoryAsync(prod, prod); if (prod.ProductDescription == null) client.GetDescriptionAsync(prod, prod); if (prod.ProductPhoto == null) client.GetPhotosAsync(prod, prod); if (prod.ProductCostHistories == null) client.GetProductCostHistoryAsync(prod, prod); }); GetData(); } private void GetData() { //get the top level product data client.GetProductsCompleted += new EventHandler<GetProductsCompletedEventArgs>(

Figure 6-7 shows a form to search for nearby pets by typing an address and specifying the category of pet and search range. If the user clicks the Map Category button, the search result will be shown using Google Maps and a table, which will be explained in the next two sections.

You add a couple more media menus to the player to display the choices for the on-demand and broadcast streams that are returned through the service operations. Listing 10-13 shows the XAML for the player.

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